System Object Model
Appearance

System Object Model (SOM) is an object-oriented shared library system. DSOM, a distributed version based on CORBA, allowed objects on different computers to communicate.
Products
- IBM System Object Model/6000 (SOM/6000)
- IBM SOMobjects Developer Toolkit Version 2.1 for OS/2, AIX and Windows (10H9767)
- IBM SOMobjects Workgroup Enabler Version 2.1 for OS/2, AIX and Windows (10H9769)
- IBM SOMobjects for OS/400
Documentation
Runtime
Component | |
---|---|
SOM Run-time Kernel | SRK |
SOM Event Management Framework | SEM |
Distributed SOM Framework | SDS |
SOMobjects Interface Repository Framework | SIR |
SOMobjects Utility Classes | SUT |
- Syslevel
- Version 2.01.5 - SM20012
Files
System Object Model runtime included with OS/2 Warp Version 4 consists of the following files:
Name | Comments |
---|---|
SOM.DLL | SOM Run-time Library |
SOM.IR | SOM Implementation Repository. Types, classes, and methods provided by the SOMobjects Framework |
SOMD.DLL | Distributed SOM (DSOM) |
SOMD.MSG | Messages for SOMD.DLL |
SOMDCLS.DAT | Distributed SOM class database |
SOMDCLS.TOC | Distributed SOM class index |
SOMDD.EXE | DSOM daemon. It must be started prior to running a DSOM application |
SOMDIMPL.DAT | Distributed SOM implementation database |
SOMDIMPL.TOC | Distributed SOM implementation index |
SOMDSVR.EXE | Generic DSOM server program |
SOMEM.DLL | SOM Event Manager |
SOMIR.DLL | CORBA Interface Repository support |
SOMK.MSG | SOM error messages file |
SOMS.DLL | SOM Sockets - soms library |
SOMSEC.DLL | SOM Security library |
SOMTC.DLL | CORBA TypeCode support |
SOMU.DLL | Metaclass framework |
SOMUC.DLL | Collection Class Library |
Articles
Replacement
- somFree is a Portable implementation of SOM, but it hasn't been ported to OS/2-eCS. It is open source under the LGPL v3.
- NOM (Netlabs Object Model) was an implementation of SOM that was going to be part of Voyager, but it never got finished.
Links & publications
- System Object Model Programing Guide - (PDF)
- G221-3651-02: SOMobjects Specification Sheet - IBM 1995-04
- Books
- Jennifer Hamilton: Programming with DirectToSOM C++ - Wiley 1996, ISBN 0471-16004-0
- Robert Orfali, Dan Harkey, Jeri Edwards: The Essential Distributed Objects Survival Guide - Wiley 1996, ISBN 0-471-12993-3
- Articles
- Brian Curran: Why SOM? - IBM Personal Systems Magazine (Mar/Apr 1996)
- Gabrielle Gagnon: Exploring IBM's SOM series of articles published in PC Magazine.
- Jennifer Hamilton:Interlanguage Object Sharing with SOM
- System Object Model Programming Guide (PDF, INF)
- System Object Model Programming Reference (PDF, INF)
- SOM Wikipedia Article
- somFree - Open Source SOM clone project
- Archived: IBM SOMware at the Club - Samples for SOM 3.0